updated cstartup

dfbcc8a2 · Tomasz Wlostowski · f9d01cff · dfbcc8a2
Commit dfbcc8a2 authored Apr 09, 2011 by Tomasz Wlostowski
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Showing with 83 additions and 93 deletions

crt0.S target/lm32/crt0.S +83 -93

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--- a/target/lm32/crt0.S
+++ b/target/lm32/crt0.S
@@ -30,13 +30,6 @@
        
        .global     _start  
 _start:
-
-        /* Setup stack and global pointer */
-        mvhi    sp, hi(_fstack)
-        ori     sp, sp, lo(_fstack)
-        mvhi    gp, hi(_gp)
-        ori     gp, gp, lo(_gp)
-
 		bi _crt0_enter
       .org 0xc0

@@ -46,15 +39,19 @@ _interrupt_handler:
 	mvi r1,2
 	calli _irq_entry
 	bi _restore_all_and_return
-nop
-nop
+	nop
+	nop
 	nop

-                
-
-
+		.org 0x100                
 _crt0_enter:

+        /* Setup stack and global pointer */
+        mvhi    sp, hi(_fstack)
+        ori     sp, sp, lo(_fstack)
+        mvhi    gp, hi(_gp)
+        ori     gp, gp, lo(_gp)
+
        /* Clear BSS */
        mvhi    r1, hi(_fbss)
        ori     r1, r1, lo(_fbss)
@@ -65,13 +62,6 @@ _crt0_enter:

        calli   memset
        
-        mvi r1, 0xffffffff
-        wcsr im, r1
-
-        mvi r1, 0x1
-        wcsr ie, r1
-        
-                                                  
        /* Call main program */
        mvi     r1, 0
        mvi     r2, 0
@@ -79,7 +69,7 @@ _crt0_enter:
        calli   main

 _save_all:
-addi sp,sp,-128
+	addi sp,sp,-128
 	sw (sp+4),r1
 	sw (sp+8),r2
 	sw (sp+12),r3
@@ -87,12 +77,12 @@ addi sp,sp,-128
 	sw (sp+20),r5
 	sw (sp+24),r6
 	sw (sp+28),r7
-sw (sp+32),r8
-sw (sp+36),r9
+	sw (sp+32),r8
+	sw (sp+36),r9
 	sw (sp+40),r10
 	sw (sp+44),r11
 	sw (sp+48),r12
-sw (sp+52),r13
+	sw (sp+52),r13
 	sw (sp+56),r14
 	sw (sp+60),r15
 	sw (sp+64),r16
@@ -117,9 +107,9 @@ sw (sp+52),r13
 	ret

 _restore_all_and_return:
-lw r1,(sp+4)
+	lw r1,(sp+4)
 	lw r2,(sp+8)
-lw r3,(sp+12)
+	lw r3,(sp+12)
 	lw r4,(sp+16)
 	lw r5,(sp+20)
 	lw r6,(sp+24)
@@ -127,25 +117,25 @@ lw r3,(sp+12)
 	lw r8,(sp+32)
 	lw r9,(sp+36)
 	lw r10,(sp+40)
-lw r11,(sp+44)
+	lw r11,(sp+44)
 	lw r12,(sp+48)
 	lw r13,(sp+52)
 	lw r14,(sp+56)
 	lw r15,(sp+60)
-lw r16,(sp+64)
-lw r17,(sp+68)
+	lw r16,(sp+64)
+	lw r17,(sp+68)
 	lw r18,(sp+72)
-lw r19,(sp+76)
+	lw r19,(sp+76)
 	lw r20,(sp+80)
 	lw r21,(sp+84)
 	lw r22,(sp+88)
 	lw r23,(sp+92)
 	lw r24,(sp+96)
-lw r25,(sp+100)
-lw gp,(sp+104)
+	lw r25,(sp+100)
+	lw gp,(sp+104)
 	lw fp,(sp+108)
 	lw ra,(sp+116)
-lw ea,(sp+120)
+	lw ea,(sp+120)
 	lw ba,(sp+124)
 	lw sp,(sp+112)
 	eret